SQL多个共享WHERE条件

Question

我试图找到一个好的，有效的方式来运行这样的查询：

SELECT * 
    FROM tableA a 
WHERE a.manager IN ( SELECT id 
           FROM tableB b 
          CONNECT BY PRIOR b.id = b.manager_id 
          START WITH b.id = 'managerBob') 
     OR a.teamLead IN ( SELECT ID 
           FROM tableB b 
         CONNECT BY PRIOR b.ID = b.manager_id 
         START WITH b.ID = 'managerBob') 
     OR a.creator IN ( SELECT id 
           FROM tableB b 
         CONNECT BY PRIOR b.id = b.manager_id 
         START WITH b.id = 'managerBob') 

正如你所看到的，我试图用多个WHERE子句，但每子句在等式的右侧使用相同的数据集。如果我使用多个子句，它似乎运行速度非常缓慢，而且我确信这是因为Oracle正在运行每个子查询。有没有办法做出这样的工作？

SELECT * 
    FROM tableA a 
WHERE a.manager, 
      a.teamLead, 
      a.creator in ( SELECT id 
           FROM tableB b 
          CONNECT BY PRIOR b.id = b.manager_id 
          START WITH b.id = 'managerBob') 

顺便说一句，我很抱歉，如果这是我可以谷歌搜索，我不知道该怎么称呼这一点。

Answer 1

Subquery factoring可以帮助：

WITH people AS 
( SELECT id 
     FROM tableB b 
    CONNECT BY PRIOR b.id = b.manager_id 
     START WITH b.id = 'managerBob' 
) 
SELECT * 
    FROM tableA a 
WHERE a.manager IN (SELECT id FROM people) 
     OR a.teamLead IN (SELECT id FROM people) 
     OR a.creator IN (SELECT id FROM people) 

Answer 2

你可以这样做：

WITH bob_subordinates AS (
( SELECT id 
     FROM tableB b 
CONNECT BY PRIOR b.id = b.manager_id 
START WITH b.id = 'managerBob') 
SELECT * FROM tableA a 
WHERE a.manager in (select id from bob_subordinates) 
    OR a.teamlead in (select id from bob_subordinates) 
    or a.creator in (select id from bob_subordinates) 

替代（检查使用DISTINCT：如果ID不表B中唯一的，那么这是不相等）：

WITH bob_subordinates AS (
( SELECT DISTINCT id 
     FROM tableB b 
CONNECT BY PRIOR b.id = b.manager_id 
START WITH b.id = 'managerBob') 
SELECT DISTINCT a.* 
    FROM tableA a JOIN bob_subordinates b ON b.id IN (a.manager, a.teamlead, a.creator); 

Answer 3

按照注释更新 - 尝试

SELECT A.* FROM 
(SELECT bb.id FROM tableB bb CONNECT BY PRIOR bb.id = bb.manager_id START WITH bb.id = 'managerBob') B INNER JOIN TABLEA A ON B.ID IN (A.MANAGER, A.TEAMLEAD, A.CREATOR)